Mix the flour and baking powder in a bowl. Add the margarine and rub into the flour. Yes, this is messy! Rub until it's like bread crumbs. Note that you really need to get this part right. If it is too buttery then you'll get rather flat and soggy buns!

Not sure how important this is, but lift and "sprinkle" the mixture back into the bowl. This adds air apparently.

Add in the sugar, stir in roughly. Amount of sugar isn't critical.

Add the egg and mix. If it's still too crumbly, add in a tiny amount of milk and stir some more. You don't want it too sticky!

Finally add lots of chocolate buttons to the mix and roughly mix in.

Grease some trays and put heaped tablespoons of mix onto the tray. Avoid having chocolate on the tray as this will burn and stick :-(